The policy of levying upon the enemy contributions in every form consistently with the laws of nations, which it may be practicable for our military commanders to adopt, should, in my judgment, be rigidly enforced, and orders to this effect have accordingly been given. By such a policy, at the same time that our own Treasury will be relieved from a heavy drain, the Mexican people will be made to feel the burdens of the war, and, consulting their own interests, may be induced the more readily to require their rulers to accede to a just peace. After the adjournment of the last session of Congress events transpired in the prosecution of the war which in my judgment required a greater number of troops in the field than had been anticipated. The strength of the Army was accordingly increased by "accepting" the services of all the volunteer forces authorized by the act of the 13th of May, 1846, without putting a construction on that act the correctness of which was seriously questioned. The volunteer forces now in the field, with those which had been "accepted" to "serve for twelve months" and were discharged at the end of their term of service, exhaust the 50,000 men authorized by that act. Had it been clear that a proper construction of the act warranted it, the services of an additional number would have been called for and accepted; but doubts existing upon this point, the power was not exercised. It is deemed important that Congress should at an early period of their session confer the authority to raise an additional regular force to serve during the war with Mexico and to be discharged upon the conclusion and ratification of a treaty of peace. I invite the attention of Congress to the views presented by the Secretary of War in his report upon this subject. I recommend also that authority be given by law to call for and accept the services of an additional number of volunteers, to be exercised at such time and to such extent as the emergencies of the service may require. In prosecuting the war with Mexico, whilst the utmost care has been taken to avoid every just cause of complaint on the part of neutral nations, and none has been given, liberal privileges have been granted to their commerce in the ports of the enemy in our military occupation. The difficulty with the Brazilian Government, which at one time threatened to interrupt the friendly relations between the two countries, will, I trust, be speedily adjusted. I have received information that an envoy extraordinary and minister plenipotentiary to the United States will shortly be appointed by His Imperial Majesty, and it is hoped that he will come instructed and prepared to adjust all remaining differences between the two Governments in a manner acceptable and honorable to both. In the meantime, I have every reason to believe that nothing will occur to interrupt our amicable relations with Brazil.